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Showing 1 to 20 of 108 for “"fatigue tests"”.
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Post-Injection Welded Joint Fatigue Tests of Sandwich Plate System Panels
… welded joints were tested to determine fatigue resistance and the effects of cyclic loading on the localized debonding of the heat affected zone at the post-injection welded joint of a SPS bridge deck. Seven panels containing one of three post-injection weld configurations were …
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Optimized carburized steel fatigue performance as assessed with gear and modified Brugger fatigue tests
Includes bibliographical references (pages 82-85).
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3D characterization of oxidation and crack propagation in Inconel 617 fatigue and creep-fatigue tests
Includes bibliographical references (pages 64-69).
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The corrosion fatigue behavior of notched 2024-T351 aluminum
Notched tensile tests and notched fatigue tests were performed at room temperature to study the corrosion fatigue behavior of aluminum alloy 2024-T351 in 3% salt solution. Notched characteristics of aluminum alloy 2024-T351 were found to be the same as those of other high strength aluminum alloys. …
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The effect of diffused hydrogen on the torsional fatigue life of 2024-T351 aluminum alloy
Fatigue tests in reversed torsion were run on 2024-T351 aluminum alloy specimens into which hydrogen had been diffused. The diffusion was accomplished by placing the specimens in a hydrogen environment (>99.5%) for 25 days at 2000 psi [13.8 MPa] and 123°C. A control group was tested which underwent …
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Software tools for computer-controlled fatigue testing
… of the personal computer in controlling fatigue tests is evaluated. Cost effectiveness and versatility favor the use of a personal computer for the control of fatigue tests.
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The effect of hydrogen on the fatigue life of high strength steel
Torsional fatigue tests were conducted on 4370 steel oil quenched and tempered at 1000° F in (l) the uncharged state, (2) the hydrogen charged state, and (3) in a hydrogen environment. The tests were conducted on both smooth (K<sub>t</sub> = l.l) and V-notch (K<sub>t</sub> = 3.8) test specimens. A …
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Tensile, Creep, and Fatigue Behaviors of Thermoplastics Including Thickness, Mold Flow Direction, Mean Stress, Temperature, and Loading Rate Effects
… to evaluate and quantify the tensile, creep, and fatigue behaviors of two thermoplastic polymers. The effects considered in this experimental study include mold flow direction, thickness, mean stress, temperature, and loading rate. Specimens were subjected to monotonic tension, creep, and …
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The effect of surface treatment and rolling direction on the fatigue behavior of grade one commercially pure titanium
Fully-reversed bending fatigue tests were conducted on both the as-received and finished grade one commercially pure titanium. Finishing is done by a process developed by TiMesh Inc., and known as TiMesh finishing. Results show that TiMesh finishing can not only increase material fatigue life at …
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The effect of loading frequency and loading level on the fatigue behavior of angle-ply carbon/PEEK thermoplastic composites
… of loading frequency and loading level on the fatigue behavior of ($\rm{\pm}45\rbrack\sb{4s}$ carbon/PEEK composite was investigated. Tention-tention load controlled fatigue tests were performed on straight sided samples using a 100-KN MTS machine. Three loading frequencies (1Hz, 5Hz, and 10Hz) …
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Fatigue and fracture behaviour of PVC at elevated temperatures
… revealed that there was a distinct difference in fatigue performance as a result of a temperature increase from 20°C to 45°C, as characterised by both SN and Paris fatigue tests. There was also, but to a lesser degree, an ageing effect. The temperature performance factor for the SN curves was …
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High temperature creep-fatigue behavior of alloy 617 and alloy 230
… used in the VHTR is predicted to be creep-fatigue damage, which arises due to startup and shutdown or power transients during normal operation. The mechanism of synergic interaction between creep and fatigue is not well understood and there are no effective modeling methods for predicting …
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Fatigue Assessment for Failed Bridge Deck Closure Pour
… loss due to corrosion, but it was not clear if fatigue and strength failure of the reinforcing bars were also contributing factor in the closure pour failure. To study the problem four fatigue tests and five strength tests performed. The specimens included six slab strips cut from the I-81 …
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Nonproportional biaxial fatigue of welded joints
The proportional and nonproportional high-cycle fatigue behavior of mild-steel, tube-to-plate welded specimens was studied. In-phase bending and torsion, constant-amplitude fatigue tests were used to define the weldment baseline material properties and also to serve as a comparison with …
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Fatigue Performance of Brass Light Pole Couplings
Bending tests were performed on behalf of the Illinois Department of Transportation on Copper Development Association 360 brass notched specimens of with internal threading and an external notch cut to a depth of 0.150 in the first design in square, diamond, and individual loading configurations. …
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Fracture Resistance of Coated Polycrystalline Silicon Wafers
… Vickers and Berkovich indentations, to stimulate fatigue fracture under routine laboratory conditions. A special attention was paid to the resistance of the wafers to cyclic thermal and mechanical loadings. The thermal fatigue tests were conducted by heating the specimens to 300°C and consequently …
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Rolling contact fatigue of silicon nitride.
… surface machining effects on its rolling contact fatigue performance. Studies have been carried out to link the surface strengths of Silicon Nitride derived from half-rod and C-Sphere flexure strength specimens to the rolling contact lives of Silicon Nitride rod and ball specimens. The rolling …
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On the Fatigue of Headed Shear Studs in Steel-Concrete Composite Bridge Girders
… Specifications on composite design, shear stud fatigue often governs over static strength, and a large number of shear connectors often result. This dissertation investigates headed shear stud fatigue capacities and demands, and provides insight into conservancies in existing design …
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Utilization of Instrument Response of SuperPaveTM Mixes at the Virginia Smart Road to Calibrate Laboratory Developed Fatigue Equations
… in the hot-mix asphalt (HMA) surface layer to fatigue cracking and (b) compressive strain at the top of the subgrade layer to rutting at the surface. These functions, called fatigue and rutting equations, are usually derived from statistically based correlations of pavement condition with …
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Delayed Failure Characteristics of Plasma-Sprayed Aluminum Oxide Applied to Stainless Steel and Titanium Alloy Substrates in Various Physiological Media
… were also analyzed using static and dynamic fatigue tests conducted in various physiological media at body temperature. The resulting information was used to evaluate these materials as potential biomaterials. In order to provide fundamental insights into the nature of the failure mechanisms, …
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